Insulator



FIG. 1 is a perspective view of an insulator, showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a side elevational view thereof; and,

FIG. 7 is an opposite side elevational view thereof.

The broken lines shown in FIGS. 1-7 illustrate portions of the insulator that form no part of the claimed design.

The wire frame lines shown throughout the views are intended to indicate surface contour. 

CLAIM The ornamental design for an insulator, as shown and described. 